For dyen: add ui/gl unittest

ui/gfx/gl_api_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/command_line.h"
+#include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gl/gl_gl_api_implementation.h"
+#include "ui/gl/gl_surface.h"
+#include "ui/gl/gl_switches.h"
+
+namespace gfx {
+
+const GLubyte* FakeGetString(GLenum name) {
+  return reinterpret_cast<const GLubyte*>("GL_EXT_foo1 GL_EXT_foo2 GL_EXT_foo3");
+}
+
+class GLApiTest : public testing::Test {
+ public:
+  void SetUp() override {
+    SetGLImplementation(kGLImplementationEGLGLES2);
+    driver_.fn.glGetStringFn = &FakeGetString;
+  }
+
+  void TearDown() override {
+    SetGLImplementation(kGLImplementationNone);
+  }
+
+  const char* GetExtensions() {
+    return reinterpret_cast<const char*>(api_.glGetStringFn(GL_EXTENSIONS));
+  }
+
+ protected:
+  DriverGL driver_;
+  RealGLApi api_;
+};
+
+TEST_F(GLApiTest, DisabledExtensionsTest) {
+  base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
+  command_line.AppendSwitchASCII(switches::kDisableGLExtensions, "GL_EXT_foo2");
+  api_.Initialize(&driver_, &command_line);
+  const std::string expected("GL_EXT_foo1 GL_EXT_foo3");
+  EXPECT_EQ(expected, GetExtensions());
+}
+
+}  // namespace gfx
+